| Value | Category | Cases | |
|---|---|---|---|
| 0 | not given | 67 |
13.9%
|
| 1995 | 12 |
2.5%
|
|
| 1996 | 68 |
14.1%
|
|
| 1997 | 108 |
22.5%
|
|
| 1998 | 68 |
14.1%
|
|
| 1999 | 50 |
10.4%
|
|
| 2000 | 78 |
16.2%
|
|
| 4444 | marked on card | 24 |
5%
|
| 6666 | mother reported | 6 |
1.2%
|
| 9997 | inconsistent | 0 |
0%
|
| 9998 | dk | 0 |
0%
|
| 9999 | missing | 0 |
0%
|
| Sysmiss | 15504 |